Internal-combustion engine



March 26, 1929. w. c. DUNN I "1,706,569

INTERNAL COMBUSTION ENGINE I I Filed Feb. 5, 1925 3 Sheets-Sheet "1 [/5 20 l7 /8 319.1 I I s? Inventor )Zlfilliam c. Dunn March 26, 1929. w. c. DUNN 1,706,569

' INTERNAL COMBUSTION ENGINE I I Filed Feb. 5, 1925 s Sheets-Sheet' 2 Inventor Patented Mar. 26, 1929.

UNITED "STATES,

WILLIAM C. D NN, or CHICAGO, rumors,

INTERNAL-COMBUSTION ENGINE.

Application inea February 5, 1925. Serial m. 7,020.

This invention relates to improvements in internal combustion engines and more particularly to what is known as the sleeve valve type, the cylinder being provided with lateral inlet and exhaust ports at opposite sides thereof, the ports being controlled by slidable sleeve members operable independently with respect to each other ,on the outside of the cylinder and in timed relation with the other parts of the engine. i

It has been customary in engines of this type to provide concentric sleeves operating exteriorly of the cylinder and during the operation a film of oil is formed between the sleeves.

It is well known that in an engine of this character it is difiicult to cool, and in cold weather and by reason of the oil sticking between the sleeves, it is difficult to start the V 90 engine.

"It is one of the objects of the present invention to overcome all of these di'fliculties and objections and to provide .an internal coinbustion engine embodying a single split or and exhaustports, the sections of the sleeve moving in opposite directions, andin which sleeve the enplosion'takes place to operate directly upon the piston, which latter reciprocates within and contacts with, the. Wall of the sleeve sections, with the result that a single sleeve will be provided andthe engine will be easier to 'cool, the pressure andforce ofthe explosion serving to assist in effectively 5 sealing the parts against the loss of fuel and compression. Y

v To the attainment. of these ends. and the accomplishment of other new anduseful. ob-

jects as will appear, the invention consists in the features ofnovelty in substantially the construction combination and arrangement of a the several parts hereinafter more fully. describedand claimed and as shown in the accompanying drawings illustrating this. in vention and in which drawings: v V

Figure 1, is a vertical longitudinal sectional view through a cylinder of anengine constructed in accordance with the principles of this invention. v

Figure2, is a detail perspective view of one of the members or sections of a sleeve valve embodying this invention. 2

Figure 3, is a. detail side elevation of the I other member or section of the sleeve valve. Figure 4, IS a horizontal sectional VlBW on line 1-4: Figure 6.

sectional sleeve valve for controlling-the inlet I Figure 5, is a top plan view of'Figure 6.

Figure 6, is a longitudinal sectional View on line-.66Figure 5.

v Figure 7, is a top plan view ofFigur'e 8.

on line 88 Figure 7.

Figure 9, isa top plan view of the other e0 Flgure 8, 1s a vertical sectional view taken stationary cylinder adapted to be coole v in suitable manner but here shown as being provided with a water jacket 16. Fixed at one end of the cylinder isa head '17 secured.

in position in anysuitable manner such as by means of fastening bolts 18.

The head projectsinto the cylinder for any suitable distance and is of an external diameter somewhat less than the internal diameter of the cylinder to form a space therebetween for receiving the end of'a sleeve valve to be hereafter described.

The inner end of the head is preferably dome shaped as at 19 for the purpose of providing sufficient clearance or combustion space, and an ignitiondevice 20 such as a spark plug extends through the head of the cylinder to be disposedjat the top of the dome for. igniting the charge introduced into the sleeve valve and between the head 17 and the piston 21." l

The piston is reciprocated in the ordinary manner, suchas by means of a connecting rod 22 connected. with a crankshaft 23.

The cylinder is provided with an inlet port 2 1 and an exhaustor outlet orter) preferably in alinement andfat opposite sides of the cylinder. j i

Arranged axially within the. oylinder15 is a tubular or. sleeve valve in whichthe' piston 21'w0rks1and reciprocates withrespect there- The-valve is of atubular construction and consists of two members or sections 28-29,

the section 28 having a portion removed therefrom to form an opening 30 laterally projects through the wall thereof. The longitudinal edges of the opening 80 are beveled or inclined with respect to each other as at 31 and diverge from the outer periphery of the sec" tion 28 inwardly.

if desired the upper end of the section 28 maybe annular as at 82 and the lower extremity may also be annular as at 33, that is, so that the ends ofthe opening 80 will terminate within. and be spaced from the respective extreu'iities of the section 28. The opening may be of any desired width but is preferably considerably less than one half of the circumference of the section.

This section 28 is provided with a lateral opening 84 adapted to be moved into and out of register with the outlet opening or port 25 as the section is reciprocated.

The section 29 of the valve is of a width to fill the opening 30 and the longitudinal edges 85 are beveled or inclined to correspond with the edges 31 of the section 28 so that when the section 29 is placed in position with respect to the section 28 the opening 30 in the section 28 will be closed.

The faces 31 and 35 on the sections 28-29 are so arranged and co-operate with each other that pressure created within the valve will tend to force the section 29 outwardly with respect to the section 28 to cause the inclined or beveled co-operating faces 31-35 on the respective sections to form fluid tight joints, while at the same time the valve sections will be adapted for a free reltive longitudinal movement one with respect to the other. I

The section 29 is provided with, a port or opening 36 adapted to be moved into and out of register with the portor opening 24 when the section 29 is longitudinally reciprocated.

The outer face of the upper portion of the member 29 is preferably cutaway as at 37 and the outer face of the lower portion is also cut away as at 38 so thatwhen the valve sections are assembled as shown in Figures 4 and 5, the upper extremity of the section 29 will project through the annular portion 32 and the lower extremity 38 will project through the annular portion 88 of the valve section 28 to assist in guiding the relative movements of the sections 28-29 one with relation to the other, and the inner faces of the sections 28-29 will co-incide.

When the valve sections are placed in position within the cylinder 15 the piston 21 will reciprocate in the valve, that is the valve will be interposed between the cylinder wall and the piston thereby producing a construction which may be more readily cooled, and at the same time the sections of the sleeve valve will, when they move in opposite directions, break or tear apart any binding which might be caused or formed by oil film or otherwise be tween ZlQlJttCGIlbCO-OPGI'QUDQ, faces, especially when the parts are cold.

If desired suitable lubricating openings 89 may be provided along the edges 31 of the sec tion 28. j v

The section 29 of the valve with its port 3 controls the inlet port 24 while the section 28 with its port 34 controls the exhaust port 25 thereby enabling a larger port to be provided in the section 28 than would be possible to tively provided with lugs 40-4l on the sides thereof and are respectively connected through the medium of connectin rods 42-43 with a crank or eccentric shaft diagrammatically 'epresented at 44 and which latter receives its motion from any suitable source 45 'n'eferably through the medium of a driving element 46 such as a sprocket chain, belt or the like.

Obviously the sleeve or valve sections 2829 will be actuated in timed relation with the other parts of the engine to open and close the inlet and exhaust ports according to the cycle of the engine in which they are employed.

This construction is particularly adapted, though not necessarily limited in its use in an engine of the four cycle type and has been so illustrated.

It will he manifest that with thepresent invention the necessity for adjusting the valves and the necessity for grinding them will be obviated as the pressure created with in the valve or sleeve will operate to cause the parts to become effectively seaied against the loss or escape of compression as the action of the faces 31 and 85 of the valve sections will adapt them to become effectively seated against each other by continuedand extensive use.

Any suitable means may be provided for lubricating the valve such as a pipe 47 which receives its supply of lubricant from any suitable source.

While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts within the scope of the claims with out departing from the spirit of this invention.

that is claimed as new is 1. An internal combustion engine including a lined cylinder, inlet and'exhaust ports,

a reciprocable piston, a sectional tubular valve, said sections extending lengthwise of the valve, said valve being seated against the inner wall of the cylinder and in which valve the piston reciprocates, the pressure or lnclined, the proximate edges of adjacent 7 sections having sliding contact, a reciprocable piston, and means for independently moving said sections for controlling said ports, the pressure created Within the valve operating to cause the contacting surfaces of the valve sections to form fluid tight joints. I

An internal combustion engine including a fixed cylinder having inlet and exhaust ports, a sectional tubular valve, saidvsections extending lengthwise of the valve, the longitudinal edges of the sections being beveled or inclined, the proximate edges of adjacent sections having sliding contact, a reciprocable piston, and means for independently moving said sections lor controlling said port-s, the pressure created Within'the valve operating to cause the contacting surfaces of the valve sections to form fluid tight joints, the extremities of one of said sections being annular and through Which annular portions the extremities out the other section reciprocates.

t. An internal combustion engine including a fixed cylinder having oppositely disposed inlet and exhaust ports, a reciprocable piston, a sectional tubular valve, said sections being seated against the inner Wall of the cylinder, the proximate longitudinal edges of the sections being beveled and having sliding contact, said piston reciprocable Within the valve, and means for independently moving the valve sections for controlling said ports, the pressure Within the valve operating to cause the contacting edges of the said sections to seal the joints therebetween.

.5. An internal combustion engine including a cylinder having oppositely disposed inlet and exhaust ports, a pair of oppositely disposed curved valve members having beveled longitudinal edges, the proximate longitudinal edges of said members having sliding contact, said members being seated against the inner Wall of the cyllnder, and

means for independently moving said inem- I bers, the cylinder pressure tending to laterally separate the said members to cause the abutting edgesthereof to'torm fluid tight joints therebetween.

'6. An internal combustion engine including a cylinder having oppositely disposed inlet and exhaust ports, apair of oppositely disposed curved valve members having beveled edges, the proximate longitudinal edges of said members having sliding contact,

said members being seated against the inner Wall of the cylinder, means for independently moving said members, the pressure in the cylinder tending to laterally separate the said members to cause the abutting edges thereof to form fluid tight joints therebe tween, a head for the cylinder extending'between the valve members, and a piston reciprocable within the valve members, said members co-operating With the cylinder head her;

In testimony whereof I have signed my name to this specification, on this 2nd day and piston to constitute an explosion cham- 

